No Store page

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That is all there is to it. Adapter and cable are only available on eBay

Written by luftek

August 3rd, 2015 at 8:06 pm

Posted in Uncategorized

Smart watch from Weloop/GoClever

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Previous watches

I had problems with my Metawatch as did everybody else. Does freaking OLED displays didn’t last long (read comments on prev post). I returned it to TI and they refunded me in full. So I forget about the watches for a while, I wear a standard one (Casio) for a while. I broke this one in a bike crash in September 2015.

Weloop Tommy

Introduction to another smartwatch

I was reading daily news on my RSS feed and there is this article on HaD about an open source project OSSW by Krzysztof Szczesniak :

And I tought to myself this could be interesting. I am kind of interested in owning a watch that has an option/potential:

  • to be my silent alarm clock,
  • TOTP (“Timed One Time Password”)
  • lasts some 2 weeks of moderate use

I find mixed reviews about it, but trust that by contributing we can make it work, work better.
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Written by luftek

August 3rd, 2015 at 3:46 pm

Compact camera plastic gear repair, Canon A480

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I received a compact camera from the brother. He said he found it that way, broken or not working properly. With this he ment, lens mechanism was not extending and retracting as it should.

I had it stored for future repair time. Today I was again looking into it and found this page: (CHDK – Canon Hack Development Kit). I thought to myself, I would like to use this. But first I wanted to see if anything can be done to repair mechanism.

I used YT disassembly movie as a reference. I opened and removed the parts in this order: back plastic, screen assembly and then lens with sensor assembly. Had to desolder 2 ribbon cables (one for photo interrupter, one prob. for focus). Then I could split assembly.

(1st pic) Lens assembly has a motor with worm gear on it and 3 reduction gears. White gear on the right (You can see clearly how plastic gears fit together. Last one in the chain is long black one (broken).
(2nd pic) Broken gear with missing axis part. This gear is long, because the lens assembly extends outward. Replacements are sold on ebay for about 5€ and ship from far away, Hong Kong.
(3rd pic) 1,2 mm drill for making hole for replacement axis.
(4th pic) leg from diode rectifier used as axis.

Camera works now. Post with CHDK installed soon to come.

lens assembly broken gear, one side axis missing 1,25 mm drill axis transplant

Written by luftek

July 27th, 2014 at 8:05 pm

Posted in Repair

Worlde globe LED, night stand lamp

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I was thinking about adding light, to small world globe I have, for quite some time.
Yesterday I diffused 6 LEDs with sand paper and soldered 6 of them (parallel) into a small blob. After drilling the holes in globe holder, I ran wires GND and +V through. Today I added a 2×56 ohm resistors (about 28 ohm, and 0.5W) for limiting resistor and a micro usb port.
When not charging my phone I can learn countries of the world (in German :))

Also nice present for a small kid, who likes to have lights when going to bed.

6 star LED illuminated globe europe, globe micro usb and limiting resistors

Written by luftek

July 27th, 2014 at 7:25 pm

Posted in Make

Hand watch – Ring of fire

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Well, I decided to remove the logo from a C**** World Time Illuminator watch I have and wear all the time now. I removed 4 screws from the back and made sure I didn’t lose the the gasket that keeps water or other liquids from entering.

There was not much in the housing. I pried out the plastic front end, reattached glass and already put everything together when decided to look for the led that illuminates the watch when pressed. It was orange led.

 before modification

Measurements showed it has a series resistor of 100 ohms and forward voltage of about 2V. Then I noticed 3 more SMD pads on other corners of the pcb. They were connected in parallel, which meant I could add 3 more LEDS for greater effect. :) Found some small RED SMD 0805 LEDS and. Added 100 ohm in series for about 13mA per LED and after soldering with my 2nd soldering iron you can see the result. It’s like the ring of fire on my hand (in person).

testing in enclosure

Written by luftek

June 16th, 2014 at 9:02 pm

Posted in Repair

ONE year after 1st sale

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I am so happy I tried to make something useful to me and others.
In 1 year I have successfully sold products to more than 100 costumers.

The beginning is definitely a sale of SAMPLE (Gameboy DMG power adapter) I received from a manufacturer. 1st sale happened on the next day I put it on eBay. There was so much adrenalin and affirmation I decided to give it a try.

Map of costumers from 11.April.2013 til 8.May.2014 (More up to date map on my about page):

I used this tutorial:

Written by luftek

May 8th, 2014 at 6:05 pm

Posted in Gameboy,Store

SDR sniffing on 433MHz – AC sockets, rf remote

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I wanted to sniff a cheap (4$ with receiver side) RF remote so it could be used in other projects. IR remotes are fine, but require “visual” contact between transmitting and receiving diode. RF modules allow for longer range with obstacles. Goal is also to replicate RF codes and be able to send them using computer terminal and implement an RF receiver for this particular remote.

USB SDR dongle all 10 RF remote commands all 10 codes stacked protoboard version

Last project using cheap SDR USB dongle I saw was: Sniffing pH Sensor RF Signals for Feedback Re: Your Esophagus. He used a Software Defined Radio to capture the radio transmissions from a Bravo Ph esophageal monitor. Before there were also projects tracking air planes, receiving images from weather satellites and “all” listed in same article.

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Written by luftek

April 19th, 2014 at 1:38 am

Posted in Make,Reuse

Projector Sharp LED lamp, part 2

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This post is a continuation of 1st post of this conversion, there I made an order for required components. Now that I have all the pieces, I can proceed with it.

Prototype LED+lenses setup
The task is to “focus” light back into 1 spot. Configuration of the lenses I envisioned is in the concept. For a prototype I tried to replicate this 
setup using PVC pipe holders that are sold in hardware shops. Result is a bright square big 5×5 mm in a “focus” about 25 mm away from the last (left) lens. I friend has a Voltcraft MT-52 multimeter, that has an option of a lux meter. I tried to use it for just the focused light. Didn’t get consistent readings. Will use it to measure projector output once assembled.

concept setup_no_light setup_light

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Written by luftek

March 28th, 2014 at 4:47 pm

Posted in Make,Repair

Laptop LED backlight reuse

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My brother had an unfortunate accident with his laptop Acer Aspire V3-771G. He closed laptop hinge but left headphones in between the keyboard and screen. That caused LCD to crack and screen didn’t work any more. Guarantee repair was out of question for its price (170€ / 230$).

REPAIR: I found a replacement screen on German eBay for (87€ shipping included). Having knowledge with disassembling laptop screens, replacing backlights (CCFL on my Lenovo T60) and watching a simple tutorial on youtube I decided I was qualified for it.

broken_lcd screen replaced  88 leds in a row backlight in use

It took me less than an episode of How I met your mother (20 min) to replace it. Brother -> happy.

REUSE; INTRO: I was left with a broken LCD screen but working LED backlight.

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Written by luftek

March 1st, 2014 at 2:58 pm

Posted in pcb,Repair,Reuse

Projector Sharp LED lamp, part 1

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sharp projectorYear ago I impulsively bought a SHARP XR-10X-L projector after watching a post on Hackaday: . I started to look into it a week ago. It has no lamp, so I will consider buying a replacement or making a LED conversion.  I collected a lot of  links, datasheets, video…

This will be 1st of 2 posts about projector conversion. I this I will write about what I need to  buy and to make it. 2nd post will be assembly. Most important  is to pick the right projector. I may have failed a it. Mine is a DLP projector. (3LCD vs. DLP). But I will still have a go with it.

Main inspiration for conversion are two videos from electrodacus: (comments of videos are very informative)

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Written by luftek

January 5th, 2014 at 12:41 am

Posted in Make,Repair